Name: root-dismissal
Type: request
Purpose: >
  Revoke administration privileges of a particular identity
Response: root-dismissal-confirmation
Inherits: message
Elements:
  Signature: { required: true }
  From: { required: true }
  Date: { required: true }
  Participant-Id: { required: true, type: identity }
Notes: >
  A root dismissal is possible only when three or more root admins
  exist.